IEC TS 62903:2018

Ultrasonics - Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self-reciprocity method

IEC TS 62903:2018, which is a Technical Specification,
a) establishes the free-field convergent spherical wave self-reciprocity method for ultrasonic transducer calibration,
b) establishes the measurement conditions and experimental procedure required to determine the transducer's electroacoustic parameters and acoustic output power using the self-reciprocity method,
c) establishes the criteria for checking the reciprocity of these transducers and the linear range of the focused field, and
d) provides guiding information for the assessment of the overall measurement uncertainties for radiation conductance.
This document is applicable to:
i) circular spherically curved concave focusing transducers without a centric hole working in the linear amplitude range,
ii) measurements in the frequency range 0,5 MHz to 15 MHz, and
iii) acoustic pressure amplitudes in the focused field within the linear amplitude range.

Vodne turbine, akumulacijske črpalke in črpalne turbine – Razpisna dokumentacija – 3. del: Smernice za tehnične specifikacije Peltonovih turbin

General Information

• Status: Published
• Publication Date: 08-Jan-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.140.50 - Electroacoustics
• ICS: 27.140 - Hydraulic energy engineering
• Technical Committee: TC 87 - Ultrasonics
• Drafting Committee: WG 8 - TC 87/WG 8
• Current Stage: DELPUB - Deleted Publication
• Start Date: 15-Feb-2022
• Completion Date: 13-Jun-2023
• Ref Project: SIST IEC/TR 61366-3:1999 - Hydraulic turbines, storage pumps and pump-turbines - Tendering documents - Part 3: Guidelines for technical specifications for Pelton turbines

Relations

• Revised: IEC TS 62903:2023 - Ultrasonics - Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self-reciprocity method
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TS 62903 ®
Edition 1.0 2018-01
TECHNICAL
SPECIFICATION
Ultrasonics – Measurements of electroacoustical parameters and acoustic
output power of spherically curved transducers using the self-reciprocity
method
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IEC TS 62903 ®
Edition 1.0 2018-01
TECHNICAL
SPECIFICATION
Ultrasonics – Measurements of electroacoustical parameters and acoustic

output power of spherically curved transducers using the self-reciprocity

method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.140.50 ISBN 978-2-8322-5026-6

– 2 – IEC TS 62903:2018  IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols . 12
5 General . 13
6 Requirements of the measurement system . 14
6.1 Apparatus configuration . 14
6.2 Measurement water tank . 14
6.3 Fixturing, positioning and orientation systems . 14
6.4 Reflector . 14
6.5 Current monitor (probe) . 14
6.6 Oscilloscope . 15
6.7 Measurement hydrophone . 15
7 Measurement of the effective half-aperture of the spherically curved transducer . 15
7.1 Setup . 15
7.2 Alignment and positioning of the hydrophone in the field . 15
7.3 Measurements of the beamwidth and the effective half-aperture . 15
7.4 Calculations of the focus half-angle and the effective area . 16
8 Measurements of the electroacoustical parameters and the acoustic output power . 16
8.1 Self-reciprocity method for transducer calibration . 16
8.1.1 Experimental procedures . 16
8.1.2 Criterion for checking the linearity of the focused field . 16
8.1.3 Criterion for checking the reciprocity of the transducer . 16
8.2 Calculations of the transmitting response to current (voltage) and voltage
sensitivity . 17
8.3 Calculations of the transmitting response at geometric focus to current
(voltage) . 17
8.4 Calculation of the pulse-echo sensitivity level . 18
8.5 Measurements of the radiation conductance and the mechanical quality
factor Q . 18
m
8.5.1 Calculations of the acoustic output power and the radiation
conductance . 18
8.5.2 Measurement of the frequency response of the radiation conductance . 18
8.6 Measurement of the electroacoustic efficiency . 18
8.6.1 Calculation of the electric input power . 18
8.6.2 Calculation of the electroacoustic efficiency . 18
8.7 Measurement of the electric impedance (admittance) . 19
9 Measurement uncertainty . 19
Annex A (informative) Relation of the average amplitude reflection coefficient on a
plane interface of water-stainless steel and the focus half-angle for a normally
incident beam of a circular spherically curved transducer [1, 2] . 20
Annex B (informative) Diffraction correction coefficient G in the free-field self-
sf
reciprocity calibration method for circular spherically curved transducers in water
neglecting attenuation [2, 3, 4]. 24

Annex C (informative) Calculation of the diffraction correction coefficient G (R/λ,β) in
sf
the free-field self-reciprocity calibration in a non-attenuating medium for a circular
spherically curved transducer [2, 3, 4, 7] . 26
Annex D (informative)  Speed of sound and attenuation in water. 28
D.1 General . 28
D.2 Speed of sound for propagation in water . 28
D.3 Acoustic attenuation coefficient for propagation in water . 28
Annex E (informative) Principle of reciprocity calibration for spherically curved
transducers [2, 3, 4]. 29
E.1 Principle of reciprocity calibration for an ideal spherically focused field of a
transducer . 29
E.2 Principle of reciprocity calibration of a real spherically focused field of a
transducer . 30
E.3 Self-reciprocity calibration of a spherically curved transducer . 30
Annex F (informative) Experimental arrangements . 35
F.1 Experimental arrangement for determining the effective radius of a
transducer [2, 3, 4, 13] . 35
F.2 Experimental arrangement of the self-reciprocity calibration method for a
spherically curved transducer [2, 3, 4, 13] . 35
Annex G (informative) Relationships between the electroacoustical parameters used
in this application [13] . 37
G.1 Relations between the free-field transmitting response to voltage (current)
and the voltage sensitivity with the radiation conductance . 37
G.2 Relation of the radiation conductance and the electroacoustic efficiency . 38
G.3 Relation of the transmitting response and voltage and acoustic output power . 38
G.4 Relation of the pulse echo sensitivity and the radiation conductance . 38
Annex H (informative) Evaluation and expression of uncertainty in the measurements
of the radiation conductance . 39
H.1 Executive standard . 39
H.2 Evaluation of uncertainty in the measurement of the radiation conductance . 39
H.2.1 Mathematical expression . 39
H.2.2 Type A evaluation of standard uncertainty . 40
H.2.3 Type B evaluation of standard uncertainty . 40
H.2.4 Evaluation of the combined standard uncertainty for the radiation
conductance . 42
Bibliography . 46

Figure A.1 – Relation curve of the amplitude reflection coefficient r(θ ) on the interface
i
of water-stainless steel for a plane wave with the incident angle θ . 22
i
Figure A.2 – Average amplitude reflection coefficient r (β) on the plane interface of
av
water-stainless steel in the geometric focal plane of a spherically curved transducer vs.
the focus half-angle β . 23
Figure C.1 – Geometry of the concave radiating surface A of a spherically curved
transducer and its virtual image surface A′ for their symmetry of mirror-images about
the geometric focal plane (x,y,0) . 26
Figure E.1 – Spherical coordinates . 31
Figure E.2 Function G (kasinθ), diffraction pattern F (kasinθ) and F (kasinθ) in the
a 0 0
geometric focal plane [7] . 32
Figure F.1 – Scheme of the measurement apparatus for determining the effective half-
aperture of a transducer . 35

– 4 – IEC TS 62903:2018  IEC 2018
Figure F.2 – Scheme of free-field self-reciprocity method applied to a spherically
curved transducer . 36

Table A.1 – Parameters used in calculation of the average amplitude reflection
coefficient . 21
Table A.2 – Amplitude reflection coefficient r(θ ) on a plane interface of water-stainless
i
steel for plane wave vs. the incident angle θ . 21
i
Table A.3 – Average amplitude reflection coefficient r (β) on plane interface of
av
water-stainless steel in
...

SLOVENSKI STANDARD
01-april-1999
9RGQHWXUELQHDNXPXODFLMVNHþUSDONHLQþUSDOQHWXUELQH±5D]SLVQDGRNXPHQWDFLMD
±GHO6PHUQLFH]DWHKQLþQHVSHFLILNDFLMH3HOWRQRYLKWXUELQ
Hydraulic turbines, storage pumps and pump-turbines - Tendering documents - Part 3:
Guidelines for technical specifications for Pelton turbines
Ta slovenski standard je istoveten z: IEC/TR 61366-3
ICS:
27.140 Vodna energija Hydraulic energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL
IEC
REPORT – TYPE 3
61366-3
First edition
1998-03
Hydraulic turbines, storage pumps
and pump-turbines –
Tendering documents –
Part 3:
Guidelines for technical specifications
for Pelton turbines
Turbines hydrauliques, pompes d’accumulation
et pompes-turbines –
Documents d’appel d’offres –
Partie 3:
Guide des spécifications techniques pour les turbines Pelton
 IEC 1998  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
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PRICE CODE
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International Electrotechnical Commission
For price, see current catalogue

– 2 – 61366-3 IEC:1998(E)
CONTENTS
Page
FOREWORD . 4
Clause
0 Introduction to technical specifications . 7
1 Scope. 9
2 Reference documents . 9
3 Technical requirements. 9
3.1 Scope of work. 9
3.2 Limits of the contract . 10
3.3 Supply by Employer . 10
3.4 Design conditions . 11
3.5 Technical performance and other guarantees. 14
3.6 Mechanical design criteria . 17
3.7 Design documentation . 17
3.8 Materials and construction . 18
3.9 Shop inspection and testing . 19
4 Technical specifications for fixed/embedded components. 20
4.1 Manifold . 21
4.2 Turbine housing. 21
5 Technical specifications for stationary/removable components . 22
5.1 Branch pipe (including intake pipe and nozzle pipe). 22
5.2 Upper turbine housing (if not embedded). 22
5.3 Turbine cover . 23
5.4 Brake jet assembly . 23
6 Technical specifications for injector/deflector system . 23
6.1 Injector system . 23
6.2 Deflector system. 24
7 Technical specifications for rotating parts, guide bearings and seals . 24
7.1 Runner . 24
7.2 Main shaft . 25
7.3 Turbine guide bearing. 25
7.4 Main shaft seal (if necessary) . 25
7.5 Standstill maintenance seal (if necessary). 26

61366-3 © IEC:1998(E) – 3 –
Clause Page
8 Technical specifications for thrust bearing (when specified as part of the
hydraulic machine). 26
8.1 Design data . 26
8.2 Bearing support . 26
8.3 Bearing assembly . 26
8.4 Oil injection pressure system . 27
9 Technical specifications for miscellaneous components . 27
9.1 Walkways, access platforms and stairs . 27
9.2 Lifting fixtures. 27
9.3 Special tools. 27
9.4 Standard tools . 27
9.5 Turbine pit hoist. 27
9.6 Nameplate. 27
9.7 Runner cart and rails (if required) . 28
9.8 Access door to turbine housing interior (if required). 28
10 Technical specifications for auxiliary systems. 28
10.1 Bearing lubrication system . 28
10.2 Cooling water system for runner. 28
10.3 Tailwater air admission system . 28
10.4 Turbine pit drainage. 28
11 Technical specifications for instrumentation . 29
11.1 Controls. 29
11.2 Indication. 29
11.3 Protection. 29
12 Spare parts. 29
13 Model acceptance tests . 29
14 Site installation and commissioning tests . 30
14.1 General . 30
14.2 Installation procedures. 30
14.3 Tests during installation . 31
14.4 Commissioning tests. 31
15 Field acceptance tests . 31
15.1 Scope and reports . 31
15.2 Inspection of cavitating pitting. 31

– 4 – 61366-3 IEC:1998(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HYDRAULIC TURBINES, STORAGE PUMPS AND PUMP-TURBINES –
TENDERING DOCUMENTS –
Part 3: Guidelines for technical specifications
for Pelton turbines
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an International
Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where for any other reason
there is the future but no immediate possibility of an agreement on an International
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• type 3, when a technical committee has collected data of a different kind from that which is
normally published as an International Standard, for example "state of the art".
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
IEC 61366-3, which is a technical report of type 3, has been prepared by IEC technical
committee 4: Hydraulic turbines.

61366-3 © IEC:1998(E) – 5 –
The text of this technical report is based on the following documents:
Committee draft Report on voting
4/110/CDV 4/122/RCV
Full information on the voting for the approval of this technical report can be found in the report
on voting indicated in the above table.
Technical Report IEC 61366-3 is one of a series which deals with Tendering documents for
hydraulic turbines, storage pumps and pump-turbines. The series consists of seven parts:
Part 1: General and annexes (IEC 61366-1)
Part 2: Guidelines for technical specification for Francis turbines (IEC 61366-2)
Part 3: Guidelines for technical specification for Pelton turbines (IEC 61366-3)
Part 4: Guidelines for technical specification for Kaplan and propeller turbines (IEC 61366-4)
Part 5: Guidelines for technical specification for tubular turbines (IEC 61366-5)
Part 6: Guidelines for technical specification for pump-turbines (IEC 61366-6)
Part 7: Guidelines for technical specification for storage pumps (IEC 61366-7)
Parts 2 to 7 are "stand-alone" publications which when used with Part 1 contain guidelines for a
specific machine type (i.e. Parts 1 and 4 represent the combined guide for Kaplan and
propeller turbines). A summary of the proposed contents for a typical set of Tendering
documents is given in the following table 1 and annex A. Table 1 summarizes the arrangement
of each part of this guide and serves as a reference for the various chapters and sections of
the Tendering documents (see 3.2 of this part).
A bilingual edition of this technical report may be issued at a later date.

Table 1 – Summary of guide for the preparation of Tendering Documents for hydraulic turbines, storage pumps and pump-turbines
CONTENTS OF GUIDE IEC 61366-1 TO IEC 61366-7 SAMPLE TABLE OF CONTENTS OF TENDERING DOCUMENTS (TD)
(Example for the Francis tu
...